A man wanted to convert to Orthodox Judaism. The rabbi invited him to a party so he could get to see Jews having fun, and the man noticed that the men danced together, and the women danced together, but men and women never danced together. When he asked the Rabbi, he was told that in their faith it was forbidden for men and women to dance with each other.
The man became worried that maybe he had gotten himself into something he really couldn’t believe in. When he got the Rabbi alone, he asked, “What about sex?’
The Rabbi replied, “Within the marriage, sex is a mitzvah, a blessing.”
“Any restrictions on that?” The man asked. “Woman on top? Doggie style? Standing up?”
“No! No!” the Rabbi exclaimed. “Not standing up! It might lead to dancing.”